By Narottam P. Bansal, J. P. Singh, Hartmut Schneider
The most recent advancements in ceramic, glass, and composites processing and characterization are lined during this quantity. integrated are papers from undefined, academia, and examine laboratories at the advances in uncomplicated technology and know-how and the way those can be utilized to deal with technological concerns confronted by way of the industry.Content:
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Additional info for Innovative Processing and Synthesis of Ceramics, Glasses and Composites VIII, Volume 166
Like any other synthesis of colloids, the diameter of silica particles from the Stöber process is mainly controlled by the relative contribution from nucleation and growth. The hydrolysis and To the extent authorized under the laws of the United States of America, all copyright interests in this publication are the property of The American Ceramic Society. Any duplication, reproduction, or republication of this publication or any part thereof, without the express written consent of The American Ceramic Society or fee paid to the Copyright Clearance Center, is prohibited.
Figure 6 is a representative plot of the conductivity data for a set of YSZ samples sintered at a given temperature using the three different methods. For ionic conductors, the conductivity is expected to depend on temperature as ~ G o T -EalkT (i) where a is conductivity, a 0 is a constant, T is measurement temperature in Kelvin, Ea is activation energy, and k is Boltmann's constant. All samples exhibited a linear relationship of In (aT) vs. 1000/T, indicating that the mechanism of conduction does not change over the entire temperature range.
The microstructure was not uniform with respect to the two different grain sizes. These differences suggest that there was a larger amount of grain growth in the microwave-processed samples compared to the fast-fired samples, even though the microwave and fast-fired samples were heated at the same rate. Also, the microwave and traditionally processed samples produced similar microstructures even though the heating times were significantly different. Figures 2 a 2c show typical microstructures observed on the surface of samples processed at 1450°C using the three different techniques.